US2006189726A1PendingUtilityA1

Preparation of yellow pigment

49
Individually held — no corporate assignee on recordPriority: Dec 31, 2003Filed: Apr 19, 2006Published: Aug 24, 2006
Est. expiryDec 31, 2023(expired)· nominal 20-yr term from priority
Inventors:Norman W. SmithRussell SchwartzKimberly ClarkTerence R. Chamberlain
C09D 11/037C09D 7/41C09B 67/0002C09B 67/0022
49
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A process for preparing transparent Pigment Yellow 138 by grinding Pigment Yellow 138 in the presence of a grinding agent, preparing an aqueous slurry of the ground particles, and filtering the slurry resulting in a filter cake containing particles of transparent Pigment Yellow 138. In addition, a process for improving color strength of an ink and/or plastic composition is also disclosed by adding transparent Pigment Yellow 138 to the composition.

Claims

exact text as granted — not AI-modified
1 . Transparent Pigment Yellow 138 prepared by 
 (a) grinding Pigment Yellow 138 in the presence of a grinding agent to obtain ground pigment;    (b) preparing an aqueous slurry of said ground pigment;    (c) filtering said slurry resulting in a filter cake containing transparent Pigment Yellow 138; and    (d) drying said filter cake to obtain ransparent Pigment Yellow 138.    
   
   
       2 . The transparent Pigment Yellow 138 of  claim 1  consisting of particles having a surface area of greater than about 50 m 2 /g.  
   
   
       3 . The transparent Pigment Yellow 138 of  claim 2  wherein the particles have a surface area of from about 50 m 2 /g to about 100 m 2 /g.  
   
   
       4 . An ink composition having a color strength that has been improved by the addition of the transparent Pigment Yellow 138 of  claim 1 .  
   
   
       5 . The ink composition of  claim 4  wherein the transparent Pigment Yellow 138 consists of particles whose surface area is greater than about 50 m 2 /g.  
   
   
       6 . The ink composition of  claim 5  wherein the particles have a surface area of from about 50 m 2 /g to about 100 m 2 /g.  
   
   
       7 . A plastic composition having a color strength that has been improved by the addition of the transparent Pigment Yellow 138 of  claim 1 .  
   
   
       8 . The plastic composition of  claim 7  wherein the transparent Pigment Yellow 138 consists of particles whose surface area is greater than about 50 m 2 /g.  
   
   
       9 . The plastic composition of  claim 8  wherein the particles have a surface area of from about 50 m 2 /g to about 100 m 2 /g.

Join the waitlist — get patent alerts

Track US2006189726A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.